| Jacob Kohnstamm | |
| Office: | Member of the Senate |
| Term Start: | 8 June 1999 |
| Term End: | 7 September 2004 |
| Office1: | State Secretary for the Interior |
| Term Start1: | 22 August 1994 |
| Term End1: | 3 August 1998 |
| Alongside1: | Tonny van de Vondervoort |
| Primeminister1: | Wim Kok |
| Predecessor1: | Dieuwke de Graaff-Nauta |
| Successor1: | Gijs de Vries (as State Secretary for the Interior and Kingdom Relations) |
| Term Start2: | 30 October 1982 |
| Term End2: | 20 May 1986 |
| Predecessor2: | Jan van Berkom |
| Successor2: | Olga Scheltema (ad interim) |
| Office3: | Member of the House of Representatives |
| Term Start3: | 3 June 1986 |
| Term End3: | 22 August 1994 |
| Term Start4: | 10 June 1981 |
| Term End4: | 16 September 1982 |
| Birthname: | Jacob Kohnstamm |
| Birth Date: | 1949 11, df=y |
| Birth Place: | Wassenaar, Netherlands |
| Nationality: | Dutch |
| Party: | Democrats 66 (since 1970) |
| Father: | Max Kohnstamm (1914–2010) |
| Residence: | Amsterdam |
| Alma Mater: | University of Amsterdam (Bachelor of Laws, Master of Laws) |
| Occupation: | Politician · civil servant · Jurist · Lawyer · Researcher · Corporate director · Nonprofit director · Media administrator · Lobbyist · Activist |
Jacob Kohnstamm (born 14 November 1949) is a retired Dutch politician and jurist who was State Secretary for the Interior from 1994 to 1998. He is a member of the Democrats 66 (D66), which he chaired from 1982 to 1986.
Kohnstamm attended a gymnasium in The Hague from April 1962 until May 1968 and applied at the University of Amsterdam in June 1971, majoring in Law and obtaining a Bachelor of Laws degree in June 1973. He worked as a student researcher before graduating with an Master of Laws degree in July 1977. Kohnstamm worked as a criminal defense lawyer in Amsterdam from October 1977 until June 1981.
Kohnstamm was elected to the House of Representatives after the 1981 general election, taking office on 10 June 1981 serving as a backbencher. After the 1982 general election Kohnstamm was not re-elected and he continued to serve until the end of the parliamentary term on 16 September 1982. Kohnstamm again worked as a criminal defense lawyer in Amsterdam from September 1982 until June 1986. Kohnstamm served as chairman of Democrats 66 from 30 October 1982 until 20 May 1986.
After the 1986 general election, Kohnstamm returned to the House of Representatives, taking office on 3 June 1986 serving as a frontbencher as spokesperson for the interior, justice, law enforcement, health, the civil service and abortion and deputy spokesperson for foreign affairs, European affairs and the Benelux Union. He also chaired the parliamentary committee for law enforcement and the parliamentary committee for the Ombudsman.
After the 1994 general election, Kohnstamm was appointed as State Secretary for the Interior in the first Kok cabinet, taking office on 22 August 1994. He was tasked with public security, emergency services, emergency management and urban planning. In December 1997 Kohnstamm announced that he would not stand for the 1998 general election. Following the cabinet formation of 1998, Kohnstamm asked not to be considered for a post in the new cabinet; the first Kok cabinet was replaced by the second Kok cabinet on 3 August 1998.
Kohnstamm remained in active in national politics; he was elected to the Senate after the 1999 Senate election, taking office on 8 June. He served as spokesperson for foreign affairs, justice, health, European affairs, art and culture, and chaired the special parliamentary committee for the European Court of Justice. He left the Senate on 7 September 2004. He was the chair of the Dutch Data Protection Authority from 2004 to 2016. From 2016 tot 2021 he was the chair of the Euthanasia Review Committee. From 2021 to 2023 he chaired the Restitution Committee that gives recommendations and binding opinions concerning Nazi looted art. He also was chair of board of the International Chamber Music Festival Schiermonnikoog (2012-2021) and of the board of the foundation Forbidden Music Regained (2014-2021).
| Knight of the Order of Orange-Nassau | Netherlands | 30 October 1998 |